Does anyone have a problem with the last disc of the Buffy S2 set ? For example the picture breaking up ? The scenes set in the church break up for about a second and the screen looks like a multi coloured chessboard. I was wondering if this was common to all sets or if I had managed to get a scratched copy. BTW I'm using a Pioneer 626D if it makes a difference. Many thanks in advance for any help you can give me.